Require use of AudioBus::create() to avoid ref-counting issues

Source/modules/webaudio/AudioNodeOutput.cpp

 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 29 matching lines @@
     : m_node(node)
     , m_numberOfChannels(numberOfChannels)
     , m_desiredNumberOfChannels(numberOfChannels)
     , m_isInPlace(false)
     , m_isEnabled(true)
     , m_renderingFanOutCount(0)
     , m_renderingParamFanOutCount(0)
 {
     ASSERT(numberOfChannels <= AudioContext::maxNumberOfChannels());
 
-    m_internalBus = adoptRef(new AudioBus(numberOfChannels, AudioNode::ProcessingSizeInFrames));
+    m_internalBus = AudioBus::create(numberOfChannels, AudioNode::ProcessingSizeInFrames);
 }
 
 void AudioNodeOutput::setNumberOfChannels(unsigned numberOfChannels)
 {
     ASSERT(numberOfChannels <= AudioContext::maxNumberOfChannels());
     ASSERT(context()->isGraphOwner());
 
     m_desiredNumberOfChannels = numberOfChannels;
 
     if (context()->isAudioThread()) {
         // If we're in the audio thread then we can take care of it right away (we should be at the very start or end of a rendering quantum).
         updateNumberOfChannels();
     } else {
         // Let the context take care of it in the audio thread in the pre and post render tasks.
         context()->markAudioNodeOutputDirty(this);
     }
 }
 
 void AudioNodeOutput::updateInternalBus()
 {
     if (numberOfChannels() == m_internalBus->numberOfChannels())
         return;
 
-    m_internalBus = adoptRef(new AudioBus(numberOfChannels(), AudioNode::ProcessingSizeInFrames));
+    m_internalBus = AudioBus::create(numberOfChannels(), AudioNode::ProcessingSizeInFrames);
 }
 
 void AudioNodeOutput::updateRenderingState()
 {
     updateNumberOfChannels();
     m_renderingFanOutCount = fanOutCount();
     m_renderingParamFanOutCount = paramFanOutCount();
 }
 
 void AudioNodeOutput::updateNumberOfChannels()
@@ skipping 162 matching lines @@
             AudioNodeInput* input = *i;
             input->enable(this);
         }
         m_isEnabled = true;
     }
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)